Do you design stairs of concrete, block or gypsum?  

If you have to design or build an exit stair shaft, what do you build the walls out of and why? 

My favorite type of stairs are solid concrete because there are no joints. There is no opportunity for fire or smoke to get through where the wall transitions from one floor to the next.  

What are your thoughts on that? Is that how you design or build? If not, why not? 

Tomorrow I will tell you why I’m not a fan of block walls in exit stairs.